Kidnappers, thieves, and assassins, the Clan Ninja are mercenaries, offering their services to the highest bidder. Lead into battle by ruthless Kosugi Ninja Masters, these stealthy killers move silently, running across rooftops and scaling walls to reach their targets; striking without warning and disappearing back into the shadows. Several of the most notorious Ninja Clans have begun working with the forces of Darkness... The Shadow Clans! These treacherous assassins have betrayed their own world for the promise of untold riches and power, while others have declared their own bid for domination, searching endlessly for mystical artifacts imbued with the power of the Void to fuel their twisted ambitions.